Results 41 to 50 of about 2,822 (176)

Some Results on Pixley–Roy Hyperspaces

open access: yesJournal of Mathematics, 2022
In this paper, we prove that if a space X has a point-countable cn-network, then the Pixley-Roy hyperspace PRX also has a point-countable cn-network. If X is a regular space with a point-countable ck-network, then so does the Pixley-Roy hyperspace PRX ...
Ljubiša D. R. Kočinac   +2 more
doaj   +1 more source

On tori triangulations associated with two-dimensional continued fractions of cubic irrationalities

open access: yes, 2009
We show several properties related to the structure of the family of classes of two-dimensional periodic continued fractions. This approach to the study of the family of classes of nonequivalent two dimexsional periodic continued fractions leads to the ...
Karpenkov, Oleg
core   +1 more source

Some remarks on hyperspaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1969
1. The purpose of this paper is to answer a question of R. Schori [3] and to provide simpler arguments for some generalizations of Schori's results. If X is a metric space, the hyperspace of X, denoted 2X, is the space of all nonvoid closed subsets of X with the usual Hausdorff metric.
openaire   +2 more sources

Outcomes of Permanent Tooth Intrusion; Pulp Necrosis, Ankylosis and Tooth Loss

open access: yesDental Traumatology, EarlyView.
ABSTRACT Background/Aim The aim of this study was to examine the timing of pulp necrosis, ankylosis, and tooth loss in intruded permanent teeth based on the stage of root development, degree of intrusion, and initial treatment. Materials and Methods In this retrospective study of intruded permanent teeth between 2013 and 2021, data from 112 teeth in 77
Brittany M. Schweiger   +4 more
wiley   +1 more source

A countably compact free Abelian group whose size has countable cofinality

open access: yesApplied General Topology, 2004
Based on some set-theoretical observations, compactness results are given for general hit-and-miss hyperspaces. Compactness here is sometimes viewed splitting into “k-Lindelöfness” and ”k-compactness” for cardinals k.
I. Castro Pereira, A.H. Tomita
doaj   +1 more source

Embedding hyperspaces

open access: yesTopology and its Applications, 2012
For a continuum, i.e. a compact connected metric space, with more than one point, the following hyperspaces are considered. \(C(X)\) consists of all subcontinua of \(X\) and \(F_2(X)\) of all nonempty subsets of \(X\) with at most two points. These hyperspaces are endowed with the Hausdorff metric.
Martínez-de-la-Vega, Verónica   +1 more
openaire   +2 more sources

Fossil Hegemony and Capitalist Realism in Tropic of Orange

open access: yesFuture Humanities, Volume 4, Issue 1, May 2026.
ABSTRACT This article examines Karen Tei Yamashita's Tropic of Orange (1997) through the lens of Mark Fisher's influential concept ‘capitalist realism’. Scholars of petrofiction have pointed to a political ambivalence in the representation of fossil fuels, where a better understanding of fossil capital can overwhelm as much as galvanize.
Claire Ravenscroft
wiley   +1 more source

Dynamic Resource Allocation for LEO Satellite Systems Under Heterogeneous Traffic Distributions

open access: yesInternational Journal of Satellite Communications and Networking, Volume 44, Issue 2, Page 199-209, March/April 2026.
ABSTRACT This paper proposes an efficient resource allocation scheme for low Earth orbit (LEO) satellite systems. Taking into account the unique characteristics of LEO systems for 6G communication services, we introduce a dynamic bandwidth and power allocation scheme specifically designed to accommodate highly heterogeneous traffic distributions.
Jaeyoung Song   +5 more
wiley   +1 more source

A generalized Picard-Lindelöf theorem

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
We generalize the Picard-Lindelöf theorem on the unique solvability of initial value problems $\dot x=f(t,x)$, $x(t_0)=x_0$, by replacing the sufficient classical Lipschitz condition of $f$ with respect to $x$ with a more general Lipschitz condition ...
Stefan Siegmund   +2 more
doaj   +1 more source

A unified projection formalism for the Al-Pd-Mn quasicrystal Xi-approximants and their metadislocations

open access: yes, 2007
The approximants xi, xi' and xi'_n of the quasicrystal Al-Mn-Pd display most interesting plastic properties as for example phason-induced deformation processes (Klein, H., Audier, M., Boudard, M., de Boissieu, M., Beraha, L., and Duneau, M., 1996, Phil ...
H.-R. Trebin, Klein H, M. Engel
core   +1 more source

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